Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4161
Number of amino acids:830
Molecular Weight:92316.36 Da
Theoretical pI:8.22


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)495.9%
Cysteine CYS (C)232.77%
Glutamic Acid GLU (E)303.61%
Aspartic Acid ASP (D)445.3%
Glycine GLY (G)475.66%
Phynylalanine PHE (F)495.9%
Isoleucine ILE (I)475.66%
Histidine HIS (H)131.57%
Lysine LYS (K)313.73%
Methionine MET (M)161.93%
Leucine LEU (L)779.28%
Asparagine ASN (N)425.06%
Glutamine GLN (Q)333.98%
Proline PRO (P)394.7%
Serine SER (S)829.88%
Arginine ARG (R)485.78%
Threonine THR (T)647.71%
Tryptophan TRP (W)50.6%
Valine VAL (V)627.47%
Tyrosine TYR (Y)293.49%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC4109
HydrogenH6437
NitrogenN1111
OxygenO1229
SulphurS39

FormulaC4109H6437N1111O1229S39
Total Number of Atoms:12925


Total number of positively charged residues (ARG + LYS):79
Total number of negatively charged residues (ASP + GLU):74
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    72085
Absorption 0.1% (=1 g/l)    0.781,   assuming all pairs of CYS residues form cystines

Ext. coefficient    70710
Absorption 0.1% (=1 g/l)    0.766,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.67

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.41, 25.30, 20.72]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:85.8313
Grand average of hydropathicity (GRAVY):-0.07